It would absolutely be worth the investment to put 99% of attendees' phones in normal boring lockers, to spend an hour with _one phone_ belonging to a high-valu

It would absolutely be worth the investment to put 99% of attendees' phones in normal boring lockers, to spend an hour with _one phone_ belonging to a high-value target attending such an event. No way to prove that happened here, but it's the sort of thing that any crook worth their salt would be spinning up a fake phone-locker business for. "We'll provide phone lockers for your event" would get you a lot of boring-but-profitable gigs, and the occasional chance of a lifetime.